Panasonic Corporation

Masahiko Haraguchi

Hisao Koga

Nobutaka Kodama

Yuji Igata

Yasushi Yokomitsu

Toru Yasukawa

Noriaki Kido

PLC modems and a PLC communication system that includes the PLC modems receive a multicast packet from a video server of a multicast group. When a MAC address table is set therein, the PLC modems and the PLC communication system convert the multicast packet into a unicast packet and transmit the converted packet to a power line. When no MAC address is set, the PLC modems and the PLC communication system transmit the multicast packet to the power line.

Power line communication apparatus, power line communication method and communication apparatus

A communicating apparatus for relaying a data communication between a first network and a second network, includes a receiving unit having an interface for a first network connection and serving to receive a packet from a terminal connected to the first network; and a control processor that acquires an IP address of the terminal from the packet received by the receiving unit, obtains a range of a subnet mask value which can be taken by the terminal based on the IP address, obtains a candidate for a host address corresponding to each subnet mask value, sets the host address candidate accessibly from the terminal, determines an estimated value of the subnet mask value of the terminal based on a state of the packet which is received from the terminal and is transmitted to the host address candidate, and sets the estimated value as a subnet mask value corresponding to an interface for the first network connection.

Communicating apparatus and controlling method of thereof

Growing community of inventors

Fukuoka, Japan

Masahiko Haraguchi